| 计算下列各题。 | ||||
|
| (1)258-79-21 =258-(79+21) =258-100 =158 | (2)2.5×1.7×4 =(2.5×4)×1.7 =10×1.7 =17 |
(3)![]() = ![]() =9+2-8 =3 | (4)![]() = ![]() = ![]() = ![]() |
编辑:chaxungu时间:2026-04-27 14:16:53分类:小学数学题库
| 计算下列各题。 | ||||
|
| (1)258-79-21 =258-(79+21) =258-100 =158 | (2)2.5×1.7×4 =(2.5×4)×1.7 =10×1.7 =17 |
(3)![]() = ![]() =9+2-8 =3 | (4)![]() = ![]() = ![]() = ![]() |